I received my V6-S yesterday, and have been listening to them nearly every minute since. ( I can't add pictures for some reason, so here - http://i.imgur.com/x9AkFyd.jpg )
I love these IEMs. Separation is fantastic, mids are forward, and the lows/sub are exactly what they should be. I had a pair of Westone UM Pro 30s that I returned before ordering these, and I think the bass on the 30's was more pronounced, but bass seems (at least to me) to be more accurate on the V6-S. I'm glad I went with this model; I love bass, but I don't like it to overpower what I am listening to, and I really enjoy the bass presentation on these. For reference, I'm using a schiit magni/modi stack and FLAC rips, so far of Lateralus by Tool, the Bends by Radiohead and Discovery by Daft Punk.
These are my first pair of customs, and it did take a little getting used to shoving them in my ears. The right feels like it might be a tad too deep, but I am going to give it a few days to see if it is just me getting used to customs, or if there is actually an issue, there. 1964 has been great to work with so far, so I'm not worried about getting any issues resolved if need be.
Next up I'm looking for a good portable dac/amp solution, thinking JDS C5D.